Thanks for the replies guys
Brad .if you are snorkling as opposed to diving make sure you go to Koh Nang Yuan ,just next to Koh Toa . Koh Toa is not all that clear at the moment tho' still O.k. We went with a diving group and only snorkled from the boat without beach access.
Koh Nang Yuan is apparently better for snorkling and the trip includes access to the beautiful beaches and hill top view point.You cannot use flippers on this reef but can snorkel from the shore .
Will have all the details after Thursday.................
On our first trip the water was choppy so the ride in a speed boat was fairly wild . We were on a bigger launch with the divers and the water was calm .
On Thursday we will be on a large catermaran which should be even smoother .( getting older

)
.......................Dave